$ git clone -n https://gitee.com/src-opencloudos-rpms/mariadb.git /var/lib/mock/dist-oc9-build-63206-16463/root/chroot_tmpdir/scmroot/mariadb
Cloning into '/var/lib/mock/dist-oc9-build-63206-16463/root/chroot_tmpdir/scmroot/mariadb'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mariadb
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2d7bc2 import mariadb-10.11.4-4.tl4